I setup a pihole for my parents, and my dad would mention that every now and then a whole website just wouldn't work. I eventually got him to show me an example

I setup a pihole for my parents, and my dad would mention that every now and then a whole website just wouldn't work. I eventually got him to show me an example, and he was clicking on the top google results which, to me, were obviously ads and therefore went through the blocked ad.doubleclick.net domain, but to him they were legitimate search results. It's a reminder of the decades of lessons in cynicism that us tech folk take for granted (and the dim view of the world that these lessons impose on us).